When I double click a drawing to open, it starts a new instance of autocad for that drawing, rather than a new window within the running instance. Does anyone know the parameter to change this setting. Couldn't find it in help file.
I will assume you are using AutoCAD 2000 or above. Make sure that you have the variable SDI (single document interface) set to 0. Type SDI at the AutoCAD command line and try it again.
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